Looking for sex online? Don't download a PowerPoint presentation promising lessons on Kama Sutra positions - you might just end up with he digital equivalent of a sexually transmitted disease.

A new malware campaign is camouflaging its dangerous payload in the guise of a PowerPoint presentation showing 13 explicit Kama Sutra sexual positions, according to the security firm Sophos. With names like "The Frog," "Wheelbarrow" and "Lyons Stagecoach," the PowerPoint is certainly not safe for work.
Nor is it safe for your computer.

Users whose curiosities are so aroused that they download the sexual slideshow - titled "Real kamasutra.pps.exe" - are taken to an actual presentation, so for the moment, things seem to check out.
But while they're viewing the provocative pornographic pics, a backdoor Trojan called "Troj/Bckdr-RFM" is hard at work, automatically and inconspicuously planting malicious software on the victim's system. Once a computer has been corrupted with the devious Trojan, hackers can gain remote access to it and steal the user's identity, or even enlist the machine as part of a zombie army of infected computers used to launch mass denial-of-service attacks.